We have a quite large samba installation/domain spanning 4 campuses with a DC/LDAP on every campus. On one campus, one big computer-lab behaves a bit strange. All the computers connects to the DC every 2-3 minutes or so and triggers a make_user_info_map mapping 100-300 or so username's to RID's. This places high load on the LDAP-server. It doesn't matter if anyone is logged on. They do this around the clock! The lab is reinstalled and is not configured any differently than all the others. I can't find any reason for this behavior. Anyone out there got a clue? /Ulf -- Ulf Nor?n IT-avd, Mittuniversitetet 0660-57899,070-5142781